It depends on the person. My greatest adversaries essentially left me mentally wounded so the nagging vindictive part of me would like to see them suffer, but at the same time the moral repercussions I would face for not assisting them would be great and I'm straddling between "fine i guess" and "HELL NO" here.

If Kuroo Hazama can self-medicate himself, then so can you (especially if you're rude or plain arrogant). If you have a boo-boo, then just put some paper on it and you're done. Got a bigger wound? use your imagination, hotshot!

Of course, even if some one thinks twice but still dos it. How could you not just because you do not like them, I would save anyone's life if I could even my ex who hates me. The only way I could say one should not is like it was someone who just killed your family or friends and or about to kill them or you or will kill them or you if you help them live.its a dilama most of us are lucky enough never to face